i have two words for the nra. score this. >> gun advocates argue the ban that feinstein authored and which was the law from 1994 to 2004 failed to prevent the columbine massacre, carried out in part with assault weapons in 1999. shep. >> shepard: james rosen in washington, a lot of americans have apparently decided to go gun shopping before any new restrictions may or may not take affect. colorado officials say the state set a new record for background checks over the weekend. a gun store owner in san diego says saturday was his biggest day in 20 years. officials reported long lines at a gun show in cincinnati that same day. some dealers say lots of shoppers are buying the ar 15 rifle, the model police say adam lanza used on his murderous rampage. >>> who should we shoot first? that was the question for nbc news correspondent richard engle after he and colleagues got kidnapped in syria. coming up, the executions that happened right in front of them and what the kidnappers tried to make them do on a long hooded fiv